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Finding the Fourth Proportional to 75.33, 104.58 and 74.66

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Solution

The fourth proportional to 75.33, 104.58 and 74.66 is: 103.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.33 : 104.58 = 74.66 : x
  2. Step 2: Convert to fraction form
    75.33/104.58 = 74.66/x
  3. Step 3: Cross multiply
    75.33x = 104.58 × 74.66
  4. Step 4: Simplify right side
    75.33x = 7,807.42
  5. Step 5: Solve for x
    x = 7,807.42/75.33
  6. Step 6: Final answer
    x = 103.64

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.